Acetylene-torch.



`G. H. DYER & J. W. WHITPORD.

AGETYLENB TORCH. APPLICATION FILED-APB. 5, 19,13.

1,099,973. Patented June 16,1914.

.465771 ENE E@ snr r'rniir oFFGE@ GEORGE H. DYER, GF SOMERVLLE, AND JOHN TAT. 'WHITFORD, 0F BOSTON, 'MASSA- CHUSETTS; SAID WHITFORD .ASSIGNR TG SAID DYER. i

ACETYLENE-TORCH.

Specification of Letters Patent.

ltatented June 16, 1914;.

Anulication filed April 5, 1913. Serial No. 759,651.

To all jwhom t may concern:

Be it known that we, GEORGE H. DYnR and JOHN W. Wriirronn, citizens of the United States, residing at Somerville and Boston, respectively, in the county of Middlesex and count-y of Suolk, respectively, and State of Massachusetts, have invented certain new and useful Improvements in Acetylenerlerches; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an improvement in acetylene torches.

The object of the invention is to reorganize and improve the construction and Inode of operation of such torches, and to the above ends the invention consists in the torch hereinafter described and particularly deiined in the claims.'

' ln the accompanying drawings illustratf ing the preferredform of the invention, Figure 1 is a side elevation ot the head of the torch, and Fig. 2 is a sectional elevation of the same.

The illustrated embodiment of the invention is described as follows The head 1 consists of a brass casting which receives the oxygen supply pipe 2 and the acetylene Agas supply pipe 3 which are received in bores in the head, being secured therein by the use et a solder of high melting point, such as silver" solder, so-called. The head is bored and threaded at d to receive the tip 5 which is screwed into it. The gils-tight joint between the tip and head is formed by the convex surface of the sealing projection 6 of the tip. The conyei: outer surface of the projection 6 engages the conical lseat at the bottom of the tip recess 4. The tip is provided with a longitudinal bore 7 which is larger or smaller as the llame desired to be produced is larger or smaller. The upper end of the tip is countersunk at 8 to form a mixing chamber for the oxygen and the acetylene to mia in.`

This mixing chamber 8 is centrally positioned'in the end of the sealing projection 6 of the tip. It is small in size. vlts mouth is a trifle larger-in diameter than is suflicient to include the two oxygen 'and acety lene conduits which discharge into it. The conduits in the head, conducting the gases to the tip, are made by drilling holes inthe solid metal of the head. The oxygen con# duit consists of a large portion 9 which is bored through the oxygen pipe opening before the pipe is inserted. lt will be observed that the center line 10--10 of this portion 9 of the oxygen conduit passes through the mouth of the opening for the oxygen pipe 2.. The reduced portion l1 Vof the oxygen conduit is bored from the tip recess 4i. rlfhe center line 12-12 of this reduced portion clearly shows that this hole may be bored from the tip recess before the latter is inserted. The large portion 13 of the acetylene conduit is co-axial with the acetylene pipe hole in the head and may be bored at the saine time or after the borin of the acetylene lpipe hole. The reduce portion le of the acetylene conduit is bored from the tip recess in the 'same mauneras the reduced portion 1l of the oxygen conduit is bored therefrom. The center line of the reduced portion 14 of the acetylene con'- duit is indicated by the line 15-15. The center line 16-16 of the tip is also shown on the drawings. It will be observed that the center lines 1Qf-12 and 15-15 both intersect the center line of the tip i of the mixing chamber 8, and that they both vmake the same angle to the tip. The pres- One of the important features of the present invention resides in making the mixing chamber of small volume. This reduces back-tiring. An endeavor has been made to ascertain vthe reason for this, but without success, so, while the inventors have ascertained the fact, they are Aunable to state the exact scientific reason for it. It is afeature of advantage that the mixing chamber is in the tip instead of in the head, because, in ease of back-ires, the vinjury is to the tip instead of to the head-that is, the'injury is to a part more readily renewed. Besides, the fact that the mixing chamber is nearer the tip is of advantage in that the heat generated therein,l in case of back-tire, is dissipated more readily the nearer it is to the tip, because the distance therefrom is rthe less. That is to say, the heat is con? duct-edaway from it with greater facility than where it is embedded in the body of the head casting. Another useful feature of the present construction resides in the in the center fact thatJ `by' removing the tip, the smalldiameter conduit holes 11 and 14 may be cleaned with easel by direct access thereto through the tip opening 4:. Another feature of the invention resides in the arrangement of the gas conduits l1 and 14; at their discharge ends, that is, at the point. Where they discharge into the mixing chamber, Aso that neither acts as an' injector for the other.

Having lthus described the invention, what is claimed is.:-- t

1. An. acetylene torch having, in combination, a head, oxyge'n and acetylene pipes connected therewith, a tip recess thereln having a conical seat at' the bottom, oxygen andv acetylene -conduits leading from the pipesftthetipjrecess, a tip secured in the 'tiprecessfand having-.a small mixing chamber in its end registering with the central portionorapex` of the conical seat and4 into -which'the oxygen and acetylene conduits discharge.

2. An acetylene torch, having, in combination, a head, 4oxygen and acetylene pipes connected therewith, a tip recess therein having a conical seat at its bottom, oxygen and acetylene conduits leading from the pipes to the tip recess, a tip secured in the 

